<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>上传</title>
</head>
<body>
<form action="http://127.0.0.1:5000/upload" method="post" enctype="multipart/form-data">
    选择文件:<input type="file" name="the_file"><br/>
    <input type="submit">
</form>
</body>
</html>